开发地热能源 服务美丽中国

正山东地矿新能源有限公司(原名为山东地矿地热开发投资有限公司)隶属于山东省地矿局,是由山东省地矿局投资控股、14家省局二级单位参股的国有企业。经营范围涉及地热资源勘查开发利用、光伏发电、余热发电、地热供暖,基础地质评价咨询、地质灾害评估、设计和施工等。现拥有"水工环地质调查"、"液体矿产勘查"甲级资质和"地球物理勘探"、"地质钻探"、"固体     

坦桑尼亚环维多利亚湖地区金矿勘查地球物理方法应用研究

坦桑尼亚环维多利亚湖地区绿岩带是东非重要的太古宙金成矿带,由于受到准平原化作用的影响,总体覆盖较厚、较广,常规的地质填图和找矿方法效果不佳,地球物理勘查方法在金矿资源勘查中发挥了至关重要作用,为大型隐伏铁建造(BIF)型姆瓦莫拉金矿和中型构造蚀变岩型尼亚斯罗利金矿的发现起到了关键性的指导作用;以环维多利亚湖地区金矿床的成矿地质条件、岩石物理性质、地球物理场特征等信息为基础,以姆瓦莫拉金矿和尼亚斯罗利金矿为典型案例,系统总结了坦桑尼亚金矿床有效的地球物理勘查技术方法,首次归纳建立了该国境内铁建造型金矿、构造蚀变岩型金矿的地球物理找矿模型,并提出了物探勘查这两种类型金矿床可采取的最佳方法组合模式,对进入坦桑尼亚的世界各国地勘部门寻找金矿具有一定的借鉴作用和参考意义.随着我国对海外矿产勘查热度的增大,坦桑尼亚金矿床地球物理勘探方法和工作模式对世界上其他国家或地区绿岩带型金矿勘查、评价及找矿方向也具有重要指导意义.     

中国地调工作成果喜人 “中国地质调查新进展论坛”展示重大突破

正9月24日上午,中国地质调查新进展论坛在2016年中国国际矿业大会期间召开。论坛由中国地质调查局党组成员、副局长李金发主持,围绕中国地质调查局"九大计划"进展与最新成果,能源、矿产和基础地质调查等主题开展。来自我国地质矿产领域的7位专家作了专题报告,分别介绍了2016年以来中国在基础地质、能源资源和水工环地质调查取得的主要进展,同时还展示了整装勘查区找矿取得的重大突破、南海地质地球物理编图成果的应用情况等,并发布一批地质调查成果资料。     

关于就矿找矿论的几个问题

就矿找矿是指依据已知找矿线索而开展的一种找矿。就矿找矿是矿产勘查工作的一条指导方针,也是矿产勘查工作中的一种重要找矿方法。就矿找矿与新区找矿是找矿哲学理论体系中的一对范畴,讲的是矿产勘查工作在空间上的布局问题。     

国外勘查地球物理工作现状和发展趋势

概略介绍了国外勘查地球物理工作的现状和某些发展趋势,其中着重介绍利用地球物理方法进行区域地质调查和地壳、上地幔调查、寻找深部隐伏矿床、计算矿产储量和研究环境地质问题.还提到勘查地球物理方法技术的重大进展.在介绍现状的同时,力图指出勘查地球物理的一些新的应用领域、新的方法技术和发展思路.     

从江西地矿工作现状谈华东地区环境地质与资源战略的几个问题

本文对江西省环境地质、矿产资源和区域地质现状作了系统归纳,对今后的工作提出了建议,并从４个方面：变质基底及有关矿产、重点成矿带调查、城市地热勘查和区调技术方法研究对江西地矿工作谈了具体设想。     

新型AGRSS航空伽马能谱测量系统在甘肃礼县地区铀及多金属矿产勘查中的应用效果

新型AGRSS航空伽马能谱测量系统于2013年由核工业航测遥感中心自主研发,经历江苏六合、黑龙江嘉荫、甘肃礼县等测区十余万测线千米的生产实践应用,取得了较好的测量效果,推动了AGRSS系统的改进升级.本文简要介绍AGRSS系统的参数指标、系统刻度与应用状态等,通过研究直升机搭载AGRSS系统在甘肃礼县测区所采集的航空放射性测量数据信息,基本查明了该地区放射性核素区域分布特征,天然放射性核素K、U、Th水平显现"中部岩体出露区偏高、周边地层中低水平"的特点;并结合地质资料,分析典型铀矿床、金矿床的航空伽马能谱特征,结果认为新型AGRSS系统采集数据信息在矿产勘查中是有效可靠的;说明AGRSS系统对高海拔且地形切割剧烈山区的适应性较强,仪器性能稳定;同时表明AGRSS系统在地质填图、铀及多金属矿产勘查中应用效果显著.     

动力三角翼平台航磁测量系统及其在卡拉塔格勘查区的应用

航空磁法是航空物探常用的测量方法之一,具有探测深度大、效率高、成本低等优点.为满足地质填图与矿产勘查对大比例尺高精度磁测资料的需要,本次将AARC510航磁补偿和收录系统与高精度CS-VL铯光泵磁力仪搭载于动力三角翼平台上,集成了一套灵活、高效、经济、高精度的航磁测量系统.通过对卡拉塔格勘查区获得的数据的质量评价,验证了该测量系统采集、补偿数据的能力.通过对比分析勘查区航空磁测数据与地表地质和地面磁测结果,验证了利用该航磁测量系统进行区域性磁法测量的可行性和可靠性.通过解析延拓、水平梯度及斜导数等位场数据处理方法,分析了勘查区磁性构造等特征,认为勘查区发育的小规模高磁异常主要为浅源异常;区内磁性构造线主要以北西向为主,部分北东向断裂与北西向断裂切割,局部伴生的许多小规模、延伸短的构造线,推测为在构造—岩浆活动中形成的次级断裂构造或侵入岩体与围岩的接触带.     

矿产勘查投资风险问题探析

本文以矿产勘查的投资风险为切入点,在结合矿产勘查投资高风险、高收益等特点的基础上,借鉴风险投资的相关理论,得出决定风险勘查投资成功的主要因素,力求揭示我国现阶段矿产勘查所面临的问题并提出科学的建议。     

金属矿产勘查技术发展现状与思考

改革开放以来,随着科学技术的发展,也促进了金属矿产勘查技术的进步;矿产资源,尤其是金属矿产,在促进社会经济的发展方面具有巨大的意义。众所周知,矿产资源的开采受众多因素的影响,首先,最主要的影响因素就是开采地质的影响,其次,环境、气候等因素也会在矿产资源的开采过程中,产生一定的影响,这就给矿产资源的开发造成了一定的难度;改革开放以来,我国大力发展金属矿产勘查技术,经过这么多年的发展,我国的金属矿产勘查技术已经有了极大的进步。本文就我国当前的金属矿产勘查技术的现状进行简单的探讨和思考。     

Electromagnetic Induction Methods in Mining Geophysics from 2008 to 2012

In the period from 2008 to 2012, the topic of electromagnetic (EM) induction methods applied to mineral exploration has been the subject of more than 50 papers in journals and more than 300 extended abstracts presented at conferences (about 100 of which contain developments worthy of mentioning). Most of the work at the universities has been on modelling, inversion and data processing, and most of this material is published in the refereed literature. However, academia has also undertaken work on system geometry changes, system calibration and sensor design. There have been papers describing new systems developed for mineral exploration and case histories describing the use of EM methods to directly discover mineral deposits or to map the geology. Most of this work is by the service companies and mining companies and reported in the unrefereed literature. Since 2008, the pace of development of helicopter time-domain systems has slowed and more effort has been directed to developing natural source magnetic systems and to modelling and inverting this data. A number of studies comparing the results from natural source methods with the results from artificial source methods conclude that the natural source methods can see large-scale geological structures usually when there is a weak conductivity contrast with the surrounding material, but the natural source methods are unable to see small features that have a very large conductivity contrast with the country rock. Hence, they are not a good detector of mineral deposits unless one is looking for a large porphyry system.     

MapInfo综合信息矿产资源评价系统及应用

矿产资源预测是综合地学信息，进行优选靶区的有效手段之一.本文以MapInfo为平台，VC为二次开发工具，以综合信息矿产预测理论与方法为指导建立了MapInfo综合信息矿产资源评价系统.文中对MapInfo综合信息矿产资源评价系统的流程进行较为详细的论述，并以陕南地区金矿为例进行了综合评价.评价结果与其它系统相似或相近，证明该系统的有效性，为矿产预测提供了又一种技术方法.     

非传统矿产资源定量预测的理论思考

近年来,国内外对新型非传统矿产资源研究都予以高度重视,解决矿产资源短缺的这一就是非传统勘查理论与方法研究。“相似类比”一直是地质研究所遵循的基本原理,但对于具有“点型分布”的矿床,以及对于研究区不存在已知矿床没有现成模式进行“相似类比”,什么样的理论可以用来指导我们的找矿预测呢？多样性是复杂系统中客观事物外在表现的基本特征,成矿专属性只是成矿多样性的一种特例或表现形式之一。因此,非传统矿产资源预测评价的新理论必须在理论基础上既适用于寻找传统矿床类型,又不忽视对新类型矿产资源的发现,预测和评价。对于区域成矿预测的分析研究,成矿地质信息的数字化,定量化是地质异常识别与提取的重要基础,矿化特征的数字化,定量化是成矿多样性分析与评价的关键步骤,区域成矿规律的数字化,定量化是矿床谱系分析的理论核心。     

基于Boltzmann机的矿产靶区预测

矿产靶区预测是一种从统计单元集合中识别找矿靶区的非线性模式识别过程,可以利用Boltzmann机能够对外部刺激进行编码和重建的功能,实现基于Boltzmann机的矿产靶区非线性统计预测过程.鉴于此,笔者定义了面向矿产靶区预测的三层Boltzmann机模型,模型输入层神经元数目等于找矿证据数目,输出层只有一个神经元,隐藏层神经元数目由用户根据矿产靶区预测的精度要求确定;模型应用Hebbian编码和模拟退火算法相结合的随机学习算法进行训练,根据学习训练后模型输入层与隐藏层神经元之间的连接权确定找矿证据的权系数;根据证据权系数和统计单元证据组合特征计算单元成矿有利度,圈定找矿靶区.在GDAL数字图像输入输出函数库基础上,用VC++语言开发了面向栅格数据的矿产靶区预测Boltzmann机算法程序并应用于新疆阿勒泰地区的矿产靶区预测研究.结果表明,Boltzmann机模型预测的统计单元成矿有利度能够正确反映研究区已知矿床(点)的空间分布规律,因此,基于Boltzmann机的矿产靶区非线性统计预测模型是有效的.     

Opaque minerals in geothermal well no. 7, Krafla, Northern Iceland

Study of the opaque minerals from well No. 7, Krafla, indicates two mineral assemblages: (1) hydrothermally altered igneous minerals and (2) secondary minerals that have precipitated from the geothermal fluid at depths down to 2140 m, and at temperatures up to more than 340°C. Chief amongst the chemically precipitated minerals are pyrite, pyrrhotite and goethite, which is described here for the first time in an Icelandic geothermal drill hole.The geothermal system at Krafla has been periodically disturbed by the influx of volcanic emanations; this article attempts to interpret, by use of thermochemical calculations, the processes affecting the precipitated mineral assemblage.     

Comparison between moving and stationary transmitter systems in induction logging

In a general treatment of the theory of induction logging, an exact integral representation has been obtained for the mutual impedance between a vertical dipole transmitter and a coaxial dipole receiver in a three layered earth. Based on this representation, a computer model has been devised using the traditional Slingram system of induction logging and the comparatively new Turam system, ignoring borehole effects. The model results indicate that due to its much larger response, the Turam system is in general preferable to the Slingram in mineral and groundwater investigations where formation conductivity much less than 1 S/m is generally encountered. However, if the surrounding media are conductive (more than 0.1 S/m), the Turam system suffers from large amplitude attenuation and phase rotation of the primary field caused by the conductive surrounding, and is less useful than the Slingram system which does not so suffer, unless the target bed is shallow. Because it is a more complex function of system parameters than the corresponding Slingram log, a Turam log can be conveniently interpreted only by the modern inverse method using a fast algorithm for the forward solution and a high speed digital computer.     

磁法在我国矿产预测中的应用

磁法作为一种有效的辅助手段,在矿产预测中的应用已有多年历史.随着经济对资源需求的不断增加和找矿难度的加大,磁法在矿产预测中,尤其是在寻找隐伏构造和岩矿体方面变得越来越重要.本文综合叙述了磁法技术在矿产预测中的应用现状和应用方法,并对将来磁法技术在矿产预测中的应用前景进行了展望.     

巷道CSAMT法的目标体分辨能力研究

目前地表矿、浅部矿越来越少,寻找深部盲矿体变得尤为重要.可控源音频大地电磁法（CSAMT）具有抗干扰能力强、分辨率高等特点,在探测矿产资源中已经取得了较好效果,但是通常CSAMT在矿区找深部矿时,由于在巷道上方的地表接收电磁信号会受到地面不同类型的强电磁干扰,同时由于该方法对深部矿体分辨率较低的缘故,大大影响了CSAMT的应用效果.本文尝试将CSAMT的接收系统置于巷道中,使得接收系统更加接近地下目标体,期望提高对于目标体识别的准确性,保证资源勘查的工作效率和成功率.基于积分方程法对不同类型地质模型进行了CSAMT正演模拟,并对不同模型不同深度接收的CSAMT响应特征进行了分析,同时以MARE2DEM软件模拟的二维模型响应加以验证积分方程结果的正确性.结果表明在无电磁干扰条件下,在巷道接收到的电磁场信号虽弱于地面,但其对于深部盲矿或目标体具有较强的识别度.     

Mineral magnetic characterization of sediment sources from an analysis of lake and floodplain sediments in the catchments of the Old Mill reservoir and Slapton Ley,South Devon,UK

Research on suspended sediment transport in the catchments of the Old Mill reservoir and Slapton Lower Ley, South Devon, has attempted to discriminate changing catchment sources on the basis of downcore variations in the mineral magnetic properties of lake, reservoir and floodplain sediments. Here, we examine these downcore variations and also explore the variability in catchment sources and the influence of topographic controls on mineral magnetic signatures of topsoils and subsoils. Particle size controls on the mineral magnetic signatures are explored by an analysis of a fractionated sediment sample, whilst the possible impact of diagenesis is assessed by an examination of the Mn profiles in the lake and reservoir sediments. From this analysis it is evident that the mineral magnetic signatures of well sorted floodplain deposits are more likely to reflect the particle size composition of the transported material. By contrast, the mineral magnetic record in the sediment of Slapton Ley appears to be most strongly influenced by dissolution of magnetic minerals. The sediment of the Old Mill reservoir provides the only suitable record for the application of a simple mixing model which is developed in order to quantify changes in the relative contribution of topsoil and subsoil through time. The research has important implications for attempting to reconstruct sediment sources in highly eutrophic lakes and emphasizes the uncertainty in the application of simple mixing models. © 1998 John Wiley & Sons, Ltd.     

A parallel computing thin‐sheet inversion algorithm for airborne time‐domain data utilising a variable overburden

Accurate modelling of the conductivity structure of mineralisations can often be difficult. In order to remedy this, a parametric approach is often used. We have developed a parametric thin‐sheet code, with a variable overburden. The code is capable of performing inversions of time‐domain airborne electromagnetic data, and it has been tested successfully on both synthetic data and field data. The code implements an integral solution containing one or more conductive sheets, buried in a half‐space with a laterally varying conductive overburden. This implementation increases the area of applicability compared to, for example, codes operating in free space, but it comes with a significant increase in computational cost. To minimise the cost, the code is parallelised using OpenMP and heavily optimised, which means that inversions of field data can be performed in hours on multiprocessor desktop computers. The code models the full system transfer function of the electromagnetic system, including variable flight height. The code is demonstrated with a synthetic example imitating a mineralisation buried underneath a conductive meadow. As a field example, the Valen mineral deposit, which is a graphite mineral deposit located in a variable overburden, is successfully inverted. Our results match well with previous models of the deposit; however, our predicted sheet remains inconclusive. These examples collectively demonstrate the effectiveness of our thin‐sheet code.